It is possible to do, but a lot more work in H&H belted magnum case head, e.g. 6.5mm RemMag, 7mm RemMag, 8mmRemMag, 264 WinMag, 300 H&H Mag, 300 WinMag, 338 WinMag, 350 RemMag, 375 H&H Mag, 458 WinMag.
The bolt face must be opened up. That is an interrupted cut on hardened steel, but you can do it.
The extractor must be opened up.
The feed lips must be opened up. [Do it per R.A. Walsh]

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